Age is the most important number that teams look at when they want to add a player to their team. In basketball, the span of a player's his "prime" is usually considered to be between 25 and 32. A player normally reaches his peak at the age of 27 or 28 because that's usually the time when athleticism and basketball intelligence reach the highest point.
But how do players perform after they age past their so-called prime? Some people like Kobe Bryant and Paul Pierce have sustained their level of production throughout the years, while former All-Star players like Vince Carter and Jerry Stackhouse have become mere role players on their respective teams.